2015 |
Sepulveda, M; Gutierrez, S; Campos-Vallette, M; Standen, V G; Arriaza, B T; Carcamo, J J Micro-Raman Spectral Identification of Manganese Oxides Black Pigments in an Archaeological Context in Northern Chile Artículo de revista Heritage Science, 3 , 2015, ISSN: 2050-7445. Resumen | Enlaces | BibTeX | Etiquetas: archaeological art, atacama black contexts, desert, diagnosis, manganese micro-raman minerals, model, oxides, pigment, rock site spectroscopy @article{RN264, title = {Micro-Raman Spectral Identification of Manganese Oxides Black Pigments in an Archaeological Context in Northern Chile}, author = { M. Sepulveda and S. Gutierrez and M. Campos-Vallette and V.G. Standen and B.T. Arriaza and J.J. Carcamo}, url = {/brokenurl#<Go to ISI>://WOS:000362260500001}, doi = {UNSP 32, 10.1186/s40494-015-0061-2}, issn = {2050-7445}, year = {2015}, date = {2015-01-01}, journal = {Heritage Science}, volume = {3}, abstract = {The micro-Raman spectroscopy was used to identify manganese oxides, pyrolusite, manganite and cryptomelane in archaeological sites in northern Atacama Desert, Chile. The present micro-Raman data allow us to compare and expand the origins of raw materials used by archaic groups of the Atacama Desert. In the Andean highlands, pyrolusite and manganite were identified while in the coastal lowlands manganite and cryptomelane were found. The present results complement the data obtained from the lithic materials and rock art painting analyses pointing to a better understanding of the daily life of ancient populations and minerals use in this region.}, keywords = {archaeological art, atacama black contexts, desert, diagnosis, manganese micro-raman minerals, model, oxides, pigment, rock site spectroscopy}, pubstate = {published}, tppubtype = {article} } The micro-Raman spectroscopy was used to identify manganese oxides, pyrolusite, manganite and cryptomelane in archaeological sites in northern Atacama Desert, Chile. The present micro-Raman data allow us to compare and expand the origins of raw materials used by archaic groups of the Atacama Desert. In the Andean highlands, pyrolusite and manganite were identified while in the coastal lowlands manganite and cryptomelane were found. The present results complement the data obtained from the lithic materials and rock art painting analyses pointing to a better understanding of the daily life of ancient populations and minerals use in this region. |
Simirgiotis, M J; Benites, J; Areche, C; Sepulveda, B Antioxidant Capacities and Analysis of Phenolic Compounds in Three Endemic Nolana Species by Hplc-Pda-Esi-Ms Artículo de revista Molecules, 20 (6), pp. 11490-11507, 2015, ISSN: 1420-3049. Resumen | Enlaces | BibTeX | Etiquetas: antioxidant atacama berries, capacity, chilean constituents, desert, diterpenoids, extracts fruits, hplc-ms, nolana, paposo phenolics, plants, quantification, valley @article{RN237, title = {Antioxidant Capacities and Analysis of Phenolic Compounds in Three Endemic Nolana Species by Hplc-Pda-Esi-Ms}, author = { M.J. Simirgiotis and J. Benites and C. Areche and B. Sepulveda}, url = {/brokenurl#<Go to ISI>://WOS:000357992700121}, doi = {10.3390/molecules200611490}, issn = {1420-3049}, year = {2015}, date = {2015-01-01}, journal = {Molecules}, volume = {20}, number = {6}, pages = {11490-11507}, abstract = {The antioxidant features, polyphenolic composition and chromatographic fingerprints of the aerial parts from three Chilean endemic plants from the Paposo Valley located on the cost of the Atacama Desert were investigated for the first time using high pressure liquid chromatography coupled with photodiode array detector and electrospray ionization mass analysis (HPLC-PDA-ESI-MS) and spectroscopic methods. The phenolic fingerprints obtained for the plants were compared and correlated with the antioxidant capacities measured by the bleaching of the DPPH radical, the ferric reducing antioxidant power (FRAP) and quantification of the total content of phenolics and flavonoids measured by spectroscopic methods. Thirty phenolics were identified for the first time for these species, mostly phenolic acids, flavanones, flavonols and some of their glycoside derivatives, together with three saturated fatty acids (stearic, palmitic and arachidic acids). Nolana ramosissima showed the highest antioxidant activity (26.35 +/- 1.02 g/mL, 116.07 +/- 3.42 M Trolox equivalents/g dry weight and 81.23% +/- 3.77% of inhibition in the DPPH, FRAP and scavenging activity (SA) assays, respectively), followed by N. aplocaryoides (85.19 +/- 1.64 g/mL, 65.87 +/- 2.33 M TE/g DW and 53.27% +/- 3.07%) and N. leptophylla (124.71 +/- 3.01, 44.23 +/- 5.18 M TE/g DW and 38.63% +/- 1.85%).}, keywords = {antioxidant atacama berries, capacity, chilean constituents, desert, diterpenoids, extracts fruits, hplc-ms, nolana, paposo phenolics, plants, quantification, valley}, pubstate = {published}, tppubtype = {article} } The antioxidant features, polyphenolic composition and chromatographic fingerprints of the aerial parts from three Chilean endemic plants from the Paposo Valley located on the cost of the Atacama Desert were investigated for the first time using high pressure liquid chromatography coupled with photodiode array detector and electrospray ionization mass analysis (HPLC-PDA-ESI-MS) and spectroscopic methods. The phenolic fingerprints obtained for the plants were compared and correlated with the antioxidant capacities measured by the bleaching of the DPPH radical, the ferric reducing antioxidant power (FRAP) and quantification of the total content of phenolics and flavonoids measured by spectroscopic methods. Thirty phenolics were identified for the first time for these species, mostly phenolic acids, flavanones, flavonols and some of their glycoside derivatives, together with three saturated fatty acids (stearic, palmitic and arachidic acids). Nolana ramosissima showed the highest antioxidant activity (26.35 +/- 1.02 g/mL, 116.07 +/- 3.42 M Trolox equivalents/g dry weight and 81.23% +/- 3.77% of inhibition in the DPPH, FRAP and scavenging activity (SA) assays, respectively), followed by N. aplocaryoides (85.19 +/- 1.64 g/mL, 65.87 +/- 2.33 M TE/g DW and 53.27% +/- 3.07%) and N. leptophylla (124.71 +/- 3.01, 44.23 +/- 5.18 M TE/g DW and 38.63% +/- 1.85%). |
2015 |
Micro-Raman Spectral Identification of Manganese Oxides Black Pigments in an Archaeological Context in Northern Chile Artículo de revista Heritage Science, 3 , 2015, ISSN: 2050-7445. |
Antioxidant Capacities and Analysis of Phenolic Compounds in Three Endemic Nolana Species by Hplc-Pda-Esi-Ms Artículo de revista Molecules, 20 (6), pp. 11490-11507, 2015, ISSN: 1420-3049. |